In a statement released on Friday, the firm said: "Oracle alleges that SAP engaged in a deliberate, systematic and illegal scheme to access, copy, use, and distribute Oracle's copyrighted software products and related materials, in violation of federal and state law.

"The suit seeks to stop SAP's unauthorised and illegal activity and prevent future violations and to recover damages related to the violations."

SAP, which has until 2 July to respond to the complaint, said it will defend itself against the charges.